random.c File Reference

#include "ruby.h"
#include <unistd.h>
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

Go to the source code of this file.

Defines
#define	N   624
#define	M   397
#define	MATRIX_A   0x9908b0dfUL
#define	UMASK   0x80000000UL
#define	LMASK   0x7fffffffUL
#define	MIXBITS(u, v)   ( ((u) & UMASK) | ((v) & LMASK) )
#define	TWIST(u, v)   ((MIXBITS(u,v) >> 1) ^ ((v)&1UL ? MATRIX_A : 0UL))
#define	BIG_GET32(big, i)   (((BDIGIT *)(big)->digits)[i])
#define	BIG_SET32(big, i, d)   (((BDIGIT *)(big)->digits)[i] = (d))
Functions
void	init_genrand (unsigned long s)
void	init_by_array (unsigned long init_key[], int key_length)
void	next_state ()
unsigned long	genrand_int32 (void)
double	genrand_real (void)
VALUE	rand_init (VALUE vseed)
VALUE	random_seed ()
VALUE	rb_f_srand (int argc, VALUE *argv, VALUE obj)
unsigned long	make_mask (unsigned long x)
unsigned long	limited_rand (unsigned long limit)
VALUE	limited_big_rand (struct RBignum *limit)
VALUE	rb_f_rand (int argc, VALUE *argv, VALUE obj)
void	Init_Random ()
Variables
unsigned long	state [N]
int	left = 1
int	initf = 0
unsigned long *	next
int	first = 1
VALUE	saved_seed = INT2FIX(0)

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Define Documentation

#define BIG_GET32 (  big, i   )     (((BDIGIT *)(big)->digits)[i])

Referenced by limited_big_rand().

#define BIG_SET32 (  big, i, d   )     (((BDIGIT *)(big)->digits)[i] = (d))

Referenced by limited_big_rand().

#define LMASK   0x7fffffffUL

Definition at line 68 of file random.c.

#define M   397

Definition at line 65 of file random.c. Referenced by next_state().

#define MATRIX_A   0x9908b0dfUL

Definition at line 66 of file random.c.

#define MIXBITS (  u, v   )     ( ((u) & UMASK) | ((v) & LMASK) )

Definition at line 69 of file random.c.

#define N   624

Definition at line 64 of file random.c. Referenced by init_by_array(), init_genrand(), and next_state().

#define TWIST (  u, v   )     ((MIXBITS(u,v) >> 1) ^ ((v)&1UL ? MATRIX_A : 0UL))

Definition at line 70 of file random.c. Referenced by next_state().

#define UMASK   0x80000000UL

Definition at line 67 of file random.c.

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Function Documentation

unsigned long genrand_int32 (  void   )  [static]

Definition at line 150 of file random.c. References left, next, and next_state(). Referenced by genrand_real(), limited_big_rand(), and limited_rand().

double genrand_real (  void   )  [static]

Definition at line 168 of file random.c. References genrand_int32(). Referenced by rb_f_rand().

void init_by_array (  unsigned long  init_key[], int  key_length )  [static]

Definition at line 100 of file random.c. References init_genrand(), initf, left, N, and state. Referenced by rand_init().

void init_genrand (  unsigned long  s  )  [static]

Definition at line 79 of file random.c. References initf, left, N, and state. Referenced by init_by_array(), next_state(), and rand_init().

void Init_Random (  void   )

Definition at line 498 of file random.c. References rb_define_global_function(), rb_f_rand(), rb_f_srand(), rb_global_variable(), and saved_seed. Referenced by rb_call_inits().

VALUE limited_big_rand (  struct RBignum *  limit  )  [static]

Definition at line 374 of file random.c. References BIG_GET32, BIG_SET32, genrand_int32(), RBignum::len, make_mask(), rb_big_clone(), rb_big_norm(), SIZEOF_BDIGITS, and VALUE. Referenced by rb_f_rand().

unsigned long limited_rand (  unsigned long  limit  )  [static]

Definition at line 354 of file random.c. References genrand_int32(), make_mask(), and SIZEOF_LONG. Referenced by rb_f_rand().

unsigned long make_mask (  unsigned long  x  )  [static]

Definition at line 340 of file random.c. Referenced by limited_big_rand(), and limited_rand().

void next_state (   )  [static]

Definition at line 127 of file random.c. References init_genrand(), initf, left, M, N, next, state, and TWIST. Referenced by genrand_int32().

VALUE rand_init (  VALUE  vseed  )  [static]

Definition at line 196 of file random.c. References ALLOC_N, BDIGIT, first, FIX2ULONG, FIXNUM_P, free, init_by_array(), init_genrand(), rb_eTypeError, rb_obj_classname(), rb_raise(), rb_to_int(), RBIGNUM, saved_seed, SIZEOF_BDIGITS, T_BIGNUM, T_FIXNUM, TYPE, and VALUE. Referenced by rb_f_rand(), and rb_f_srand().

VALUE random_seed (   )  [static]

Definition at line 256 of file random.c. References ALLOC_N, BDIGIT, NEWOBJ, OBJSETUP, rb_big_norm(), rb_cBignum, S_ISCHR, SIZEOF_BDIGITS, T_BIGNUM, timeval::tv_sec, timeval::tv_usec, and VALUE. Referenced by rb_f_rand(), and rb_f_srand().

VALUE rb_f_rand (  int  argc, VALUE *  argv, VALUE  obj )  [static]

Definition at line 439 of file random.c. References first, FIX2LONG, FIXNUM_P, genrand_real(), INT2FIX, limited_big_rand(), limited_rand(), LONG2NUM, LONG_MIN, rand_init(), random_seed(), rb_big_clone(), rb_big_minus(), rb_dbl2big(), rb_float_new(), rb_Integer(), rb_scan_args(), RFLOAT, T_BIGNUM, T_FIXNUM, T_FLOAT, T_NIL, TYPE, and VALUE. Referenced by Init_Random().

VALUE rb_f_srand (  int  argc, VALUE *  argv, VALUE  obj )  [static]

Definition at line 323 of file random.c. References rand_init(), random_seed(), rb_scan_args(), rb_secure(), and VALUE. Referenced by Init_Random().

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Variable Documentation

int first = 1 [static]

Definition at line 192 of file random.c. Referenced by rand_init(), and rb_f_rand().

int initf = 0 [static]

Definition at line 74 of file random.c. Referenced by init_by_array(), init_genrand(), and next_state().

int left = 1 [static]

Definition at line 73 of file random.c. Referenced by genrand_int32(), init_by_array(), init_genrand(), and next_state().

unsigned long* next [static]

Definition at line 75 of file random.c. Referenced by genrand_int32(), and next_state().

VALUE saved_seed = INT2FIX(0) [static]

Definition at line 193 of file random.c. Referenced by Init_Random(), and rand_init().

unsigned long state[N] [static]

Definition at line 72 of file random.c. Referenced by init_by_array(), init_genrand(), and next_state().

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